The tremendous radiation encountered in the Van Allen Belt, solar radiation, cosmic radiation, temperature control, and many other problems connected with space travelÖ

In this statement the author uses the same problem four times but calls it something different each time. His central claim is that radiation from the Sun creates an escalating heat problem due to the insulating properties of a vacuum. The science sounds reasonable, but what the author has failed to understand, (or reveal) is that the heat is lost due to radiation. This is precisely how the heat producing energy arrived at the rocket in the first place.

Quote:

Radiation of all types will travel through a vacuum but will not affect the vacuum. Radiant heat from the sun travels through the vacuum of space but does not "warm" space.

Here the author actually tells us the answer to the problem he has constructed. Heat is transferred by two methods, conduction and radiation: any intelligent person can read this in a secondary school science textbook.